Date Added: Oct 2010
IP telephony is convenient way of communication and brings number of benefits. One of them is the fact that many services can be implemented in a original way and it opens new field of research and is a challenge for designers of communication solutions especially based on open-source platform. This paper describes proposal and advanced implementation of IP telephony which have been arisen in Czech academical environment, concretely in a group of IP telephony acting under Czech education and scientific network association. Author is a senior researcher in this group and he decided to describe the most considerable voice over IP implementations at Czech universities and share knowledge with other experts interesting in IP telephony.